Discussion of anything and everything relating to chess playing software and machines.
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Uri Blass
Posts: 10872Joined: Thu Mar 09, 2006 12:37 amLocation: Tel-Aviv Israel
Post by Uri Blass Sat Nov 14, 2015 2:50 pm
kgburcham wrote: Dann Corbit wrote: Wow! You replicated the bug exactly.
but mine didn't play Kg4.
also crazy score from +55 to 0.
I think that the score is the important factor and not the move.
0.00 means that it can practically choose another move with the same score if it already has 0.00 for Bc2 in the hash from previous analysis.
Showing 0.00 for winning position is clearly a bug
and maybe stockfish should stop doing pruning when the score is high for one side or at least do significantly less pruning in this situation.
syzygy
Posts: 5712Joined: Tue Feb 28, 2012 11:56 pm
Post by syzygy Sat Nov 14, 2015 3:48 pm
Uri Blass wrote: Showing 0.00 for winning position is clearly a bug
I think you are right, but incorrectly doing what you say was the reason for search instability in the past (Eelco once improved it significantly). Since the search is again (or still) unstable, it might be good to very carefully look at it again.
MikeGL
Posts: 1010Joined: Thu Sep 01, 2011 2:49 pm
Post by MikeGL Sat Nov 14, 2015 4:16 pm
kgburcham wrote: [d] 7k/1P6/2P2q2/4pB2/8/4Q2K/1r6/8 w - -73.Kh4 Rh2+
44/115 28:08 0.00 64.Bc2 Rb4 65.Be4 Rb2 66.Kg4 Qe6+ 67.Kg5 Qe7+ 68.Kf5 Qf7+ 69.Kxe5 Qg7+ 70.Ke6 Qg8+ 71.Kf5 Qf7+ 72.Kg4 Qe6+
73.Kh4 Rh2+ 74.Kg3 Qh3+ 75.Kf4 Qh6+ 76.Kf5 Rh5+ 77.Kg4 (43.182.341.332) 25576 TB:303.624.763
Seems 73.Kg3 instead of 73.Kh4 is the winning move after checking with engines.
kgburcham
Posts: 2016Joined: Sun Feb 17, 2008 4:19 pm
Post by kgburcham Sat Nov 14, 2015 4:34 pm
MikeGL wrote: kgburcham wrote: [d] 7k/1P6/2P2q2/4pB2/8/4Q2K/1r6/8 w - -73.Kh4 Rh2+
44/115 28:08 0.00 64.Bc2 Rb4 65.Be4 Rb2 66.Kg4 Qe6+ 67.Kg5 Qe7+ 68.Kf5 Qf7+ 69.Kxe5 Qg7+ 70.Ke6 Qg8+ 71.Kf5 Qf7+ 72.Kg4 Qe6+
73.Kh4 Rh2+ 74.Kg3 Qh3+ 75.Kf4 Qh6+ 76.Kf5 Rh5+ 77.Kg4 (43.182.341.332) 25576 TB:303.624.763
Seems 73.Kg3 instead of 73.Kh4 is the winning move after checking with engines.
from this position compare 73.Kg3 and 73.Kh4
[d] 7k/1P6/2P1q3/8/4B1K1/4Q3/1r6/8 w - -
46/112 27:51 +62.96 64.Bc2 Rb4 65.Be4 Rb2 66.Kg4 Qe6+ 67.Kg5 Qe7+ 68.Kf5 Qf7+ 69.Kxe5 Qg7+ 70.Ke6 Qg8+ 71.Kf5 Rb5+ 72.Kf4 Qf8+ 73.Kg3 Qf6 (44.906.547.138) 26871 TB:243.552.177
35/115 14:18 0.00 64.Bc2 Rb4 65.Be4 Rb2 66.Kg4 Qe6+ 67.Kg5 Qe7+ 68.Kf5 Qf7+ 69.Kxe5 Qg7+ 70.Ke6 Qg8+ 71.Kf5 Qf7+ 72.Kg4 Qe6+ 73.Kh4 Rh2+ (23.610.171.721) 27504 TB:113.327.287
no chess program was born totally from one mind. all chess programs have many ideas from many minds.
syzygy
Posts: 5712Joined: Tue Feb 28, 2012 11:56 pm
Post by syzygy Sat Nov 14, 2015 6:43 pm
Almost by accident I tried this position from game 22:
[d]7k/1P5p/4q3/2P1p3/8/4QBPK/1r6/8 w - - 1 60
In the game, Stockfish played g4 with a score of 13.94.
Stockfish 111115 (6 threads, 6-piece TBs):
Code: Select all
info depth 20 seldepth 50 multipv 1 score cp 300 nodes 22616860 nps 8515384 hashfull 30 tbhits 101849 time 2656 pv g3g4 h7h5 c5c6 h5g4 f3g4 e6d6 g4f5 h8g7 e3g5 g7f8 f5e4 f8f7 g5h5 f7e7 h5h7 e7d8 h7h8 d8e7 h8g7 e7d8 h3g3 b2b6 g7h8 d8e7 h8h7 e7d8 g3g4 b6b4 g4h5 d6d1 h5g5 d1d2 g5f5 d2f4 f5e6 f4g4 e6f6 g4f4 e4f5
..
info depth 27 seldepth 73 multipv 1 score cp 382 nodes 298944615 nps 12836852 hashfull 348 tbhits 1944534 time 23288 pv g3g4 b2b3 e3e4 h8g7 c5c6 e6d6 g4g5 d6c5 h3g2 b3b2 f3e2 b2b3 e2d3 b3d3 e4d3 c5c6 d3f3 c6b5 g2g3 g7g8 f3e4 g8g7 g3g4 b5d7 g4h4 d7d6 e4f3 d6c7 h4h3 c7d7 h3h2 d7c7 h2g2 c7c2 g2h3 c2c7 f3b3 c7d7 h3g3 d7d4 b3f3
info depth 28 currmove g3g4 currmovenumber 1
info depth 28 seldepth 73 multipv 1 score cp 389 lowerbound nodes 351657197 nps 12910536 hashfull 384 tbhits 2256152 time 27238 pv g3g4
info depth 28 currmove g3g4 currmovenumber 1
info depth 28 currmove f3g4 currmovenumber 2
info depth 28 currmove h3h4 currmovenumber 3
info depth 28 seldepth 73 multipv 1 score cp 382 upperbound nodes 371635177 nps 12962058 hashfull 398 tbhits 2333383 time 28671 pv g3g4 h7h5
info depth 28 currmove g3g4 currmovenumber 1
info depth 28 seldepth 73 multipv 1 score cp 389 lowerbound nodes 373582741 nps 12964870 hashfull 400 tbhits 2346668 time 28815 pv g3g4
info depth 28 currmove g3g4 currmovenumber 1
info depth 28 currmove f3g4 currmovenumber 2
info depth 28 currmove h3h4 currmovenumber 3
info depth 28 seldepth 73 multipv 1 score cp 380 upperbound nodes 381179661 nps 12968382 hashfull 410 tbhits 2411491 time 29393 pv g3g4 h7h5
info depth 28 currmove g3g4 currmovenumber 1
info depth 28 seldepth 73 multipv 1 score cp 392 lowerbound nodes 390155443 nps 12977496 hashfull 418 tbhits 2485991 time 30064 pv g3g4
info depth 28 currmove g3g4 currmovenumber 1
info depth 28 currmove f3g4 currmovenumber 2
info depth 28 currmove h3h4 currmovenumber 3
info depth 28 seldepth 73 multipv 1 score cp 376 upperbound nodes 390583106 nps 12976614 hashfull 419 tbhits 2491767 time 30099 pv g3g4 h7h5
info depth 28 currmove g3g4 currmovenumber 1
info depth 28 currmove h3h4 currmovenumber 2
info depth 28 currmove f3g4 currmovenumber 3
info depth 28 seldepth 73 multipv 1 score cp 340 upperbound nodes 400071885 nps 12969555 hashfull 430 tbhits 2577418 time 30847 pv g3g4 h7h5
info depth 28 currmove g3g4 currmovenumber 1
info depth 28 seldepth 73 multipv 1 score cp 368 lowerbound nodes 429224224 nps 12962408 hashfull 463 tbhits 2880692 time 33113 pv g3g4
info depth 28 currmove g3g4 currmovenumber 1
info depth 28 currmove f3g4 currmovenumber 2
info depth 28 currmove h3h4 currmovenumber 3
info depth 28 seldepth 73 multipv 1 score cp 331 upperbound nodes 438652953 nps 12969072 hashfull 468 tbhits 2983024 time 33823 pv g3g4 h7h5
info depth 28 currmove g3g4 currmovenumber 1
info depth 28 currmove f3g4 currmovenumber 2
info depth 28 currmove h3h4 currmovenumber 3
info depth 28 seldepth 73 multipv 1 score cp 254 upperbound nodes 452632266 nps 12982425 hashfull 479 tbhits 3077683 time 34865 pv g3g4 h7h5
info depth 28 currmove g3g4 currmovenumber 1
info depth 28 currmove f3g4 currmovenumber 2
info depth 28 currmove h3h4 currmovenumber 3
info depth 28 seldepth 73 multipv 1 score cp 156 upperbound nodes 485636651 nps 13008589 hashfull 508 tbhits 3367891 time 37332 pv g3g4 h7h5
info depth 28 currmove g3g4 currmovenumber 1
info depth 28 currmove f3g4 currmovenumber 2
info depth 28 currmove h3h4 currmovenumber 3
info depth 28 seldepth 73 multipv 1 score cp 144 nodes 580576870 nps 12994692 hashfull 592 tbhits 4558966 time 44678 pv g3g4 h7h5 c5c6 h5g4 f3g4 e6d6 g4f5 d6f6 f5c2 b2b4 c2e4 b4b2 e4g2 f6d6 e3g5 b2b3 h3g4 e5e4 g4h5 d6h2 g5h4 h2d6 g2e4 b3b5 e4f5 h8g7 h4g4 g7f8 g4f3 f8e7 f3e2 b5e5 e2c2 e5c5 c2e4 e7f8 e4f3 f8g7 f3g2 g7f8 g2f2 c5b5 h5g4 f8g7 f2g2 b5b4 g4h3 g7f8 g2f3 d6h6 h3g2 h6g5 f5g4 f8e7 g2g3 g5h6
info depth 29 currmove g3g4 currmovenumber 1
info depth 29 currmove h3h4 currmovenumber 2
info depth 29 currmove f3g4 currmovenumber 3
info depth 29 seldepth 73 multipv 1 score cp 137 upperbound nodes 616625826 nps 13038140 hashfull 628 tbhits 5092811 time 47294 pv g3g4 h7h5
info depth 29 currmove g3g4 currmovenumber 1
info depth 29 currmove h3h4 currmovenumber 2
info depth 29 currmove f3g4 currmovenumber 3
info depth 29 seldepth 73 multipv 1 score cp 131 upperbound nodes 618075175 nps 13040110 hashfull 628 tbhits 5115026 time 47398 pv g3g4 h7h5
info depth 29 currmove g3g4 currmovenumber 1
info depth 29 currmove h3h4 currmovenumber 2
info depth 29 currmove f3g4 currmovenumber 3
info depth 29 seldepth 73 multipv 1 score cp 120 upperbound nodes 621474971 nps 13043591 hashfull 630 tbhits 5165116 time 47646 pv g3g4 h7h5
info depth 29 currmove g3g4 currmovenumber 1
info depth 29 currmove h3h4 currmovenumber 2
info depth 29 currmove f3g4 currmovenumber 3
info depth 29 seldepth 73 multipv 1 score cp 105 upperbound nodes 644350667 nps 13096025 hashfull 640 tbhits 5409780 time 49202 pv g3g4 h7h5
info depth 29 currmove g3g4 currmovenumber 1
info depth 29 currmove h3h4 currmovenumber 2
info depth 29 currmove f3g4 currmovenumber 3
info depth 29 seldepth 73 multipv 1 score cp 85 upperbound nodes 671241721 nps 13189014 hashfull 653 tbhits 5694834 time 50894 pv g3g4 h7h5
info depth 29 currmove g3g4 currmovenumber 1
info depth 29 currmove f3g4 currmovenumber 2
info depth 29 currmove h3h4 currmovenumber 3
info depth 29 seldepth 73 multipv 1 score cp 58 upperbound nodes 800405694 nps 13362588 hashfull 760 tbhits 7350725 time 59899 pv g3g4 h7h5
info depth 29 currmove g3g4 currmovenumber 1
info depth 29 currmove h3h4 currmovenumber 2
info depth 29 currmove f3g4 currmovenumber 3
info depth 29 seldepth 73 multipv 1 score cp 24 nodes 907474622 nps 13588611 hashfull 817 tbhits 8587998 time 66782 pv f3g4 e6f6 c5c6 f6f1 h3h4 f1f6 e3g5 b2h2 g4h3 f6d6 b7b8r d6b8 g5e7 b8c8 g3g4 h7h6 e7f6 h8g8 h4g3 h2b2 h3f1 b2b3 g3h4 b3b4 f6g6 g8h8 g6h6 h8g8 h6g6 g8h8 f1g2 c8f8 g6h5 h8g7 h5g5 g7h7 g2d5 f8f2 h4h5 f2h2 g5h4 h2h4 h5h4 b4b5 d5e4 h7g7 h4g5 b5c5 g5f5 g7f7 g4g5
info depth 30 currmove f3g4 currmovenumber 1
info depth 30 currmove h3h4 currmovenumber 2
info depth 30 currmove g3g4 currmovenumber 3
info depth 30 seldepth 73 multipv 1 score cp 17 upperbound nodes 1037038612 nps 13790957 hashfull 853 tbhits 9934186 time 75197 pv f3g4 e6f6
info depth 30 currmove f3g4 currmovenumber 1
info depth 30 currmove h3h4 currmovenumber 2
info depth 30 currmove g3g4 currmovenumber 3
info depth 30 seldepth 73 multipv 1 score cp 10 upperbound nodes 1058052270 nps 13794324 hashfull 857 tbhits 10107465 time 76702 pv f3g4 e6f6
info depth 30 currmove f3g4 currmovenumber 1
info depth 30 currmove g3g4 currmovenumber 2
info depth 30 currmove h3h4 currmovenumber 3
info depth 30 seldepth 73 multipv 1 score cp 0 upperbound nodes 1154443483 nps 13821366 hashfull 884 tbhits 11077140 time 83526 pv f3g4 e6f6
info depth 30 currmove f3g4 currmovenumber 1
info depth 30 currmove g3g4 currmovenumber 2
info depth 30 currmove h3h4 currmovenumber 3
info depth 30 seldepth 73 multipv 1 score cp 0 nodes 1169761156 nps 13825820 hashfull 888 tbhits 11174850 time 84607 pv f3g4 e6f6 c5c6 f6f1 h3h4 f1f6 e3g5 b2h2 g4h3 f6d6 g3g4 h2c2 c6c7 d6c7 g5f6 h8g8 g4g5 c2h2 f6e6 g8g7 e6b3 c7c6 h4g3 h2h3 g3h3 c6h1 h3g4 h1e4 g4g3 e4e1 g3f3 e1f1 f3e4 f1f4 e4d3 f4f3 d3c2 f3f2 c2c1 f2g1 c1c2 g1f2
info depth 31 currmove f3g4 currmovenumber 1
info depth 31 currmove h3h4 currmovenumber 2
info depth 31 currmove g3g4 currmovenumber 3
info depth 31 seldepth 73 multipv 1 score cp 0 nodes 1211372110 nps 13790666 hashfull 902 tbhits 11552718 time 87840 pv f3g4 e6f6 c5c6 f6f1 h3h4 f1f6 e3g5 b2h2 g4h3 f6d6 g3g4 h2c2 c6c7 d6c7 g5f6 h8g8 g4g5 c2h2 f6e6 g8g7 e6b3 c7c6 h4g3 h2h3 g3h3 c6h1 h3g4 h1e4 g4g3 e4e1 g3f3 e1f1 f3e4 f1f4 e4d3 f4f3 d3c2 f3f2 c2c1 f2g1 c1c2 g1f2
info depth 32 currmove f3g4 currmovenumber 1
info depth 32 currmove g3g4 currmovenumber 2
info depth 32 currmove h3h4 currmovenumber 3
info depth 32 seldepth 73 multipv 1 score cp 0 nodes 1379070298 nps 13766748 hashfull 935 tbhits 14147802 time 100174 pv f3g4 e6f6 c5c6 f6f1 h3h4 f1f6 e3g5 b2h2 g4h3 f6d6 g3g4 h2c2 c6c7 d6c7 g5f6 h8g8 g4g5 c2h2 f6e6 g8g7 e6b3 c7c6 h4g3 h2h3 g3h3 c6h1 h3g4 h1e4 g4g3 e4e1 g3f3 e1f1 f3e4 f1f4 e4d3 f4f3 d3c2 f3f2 c2c1 f2g1 c1c2 g1f2
info depth 33 currmove f3g4 currmovenumber 1
info depth 33 currmove h3h4 currmovenumber 2
info depth 33 currmove g3g4 currmovenumber 3
info depth 33 seldepth 73 multipv 1 score cp 0 nodes 1497590248 nps 13840944 hashfull 948 tbhits 15704748 time 108200 pv f3g4 e6f6 c5c6 f6f1 h3h4 f1f6 e3g5 b2h2 g4h3 f6d6 g3g4 h2c2 c6c7 d6c7 g5f6 h8g8 g4g5 c2h2 f6e6 g8g7 e6b3 c7c6 h4g3 h2h3 g3h3 c6h1 h3g4 h1e4 g4g3 e4e1 g3f3 e1f1 f3e4 f1f4 e4d3 f4f3 d3c2 f3f2 c2c1 f2g1 c1c2 g1f2
and there it stays at least until d=37.
kgburcham
Posts: 2016Joined: Sun Feb 17, 2008 4:19 pm
Post by kgburcham Sat Nov 14, 2015 8:42 pm
[d] 7k/1P5p/4q3/2P1p3/8/4QBPK/1r6/8 w - -
no chess program was born totally from one mind. all chess programs have many ideas from many minds.
SuneF
Posts: 127Joined: Thu Sep 17, 2009 11:19 am
Post by SuneF Sat Nov 14, 2015 9:01 pm
syzygy wrote: Uri Blass wrote: Showing 0.00 for winning position is clearly a bug
I think you are right, but incorrectly doing what you say was the reason for search instability in the past (Eelco once improved it significantly). Since the search is again (or still) unstable, it might be good to very carefully look at it again.
I think any search with a hashtable and path dependent evaluation (repetitions and 50 move-rule) will be inherently unstable.
syzygy
Posts: 5712Joined: Tue Feb 28, 2012 11:56 pm
Post by syzygy Sat Nov 14, 2015 10:07 pm
SuneF wrote: syzygy wrote: Uri Blass wrote: Showing 0.00 for winning position is clearly a bug
I think you are right, but incorrectly doing what you say was the reason for search instability in the past (Eelco once improved it significantly). Since the search is again (or still) unstable, it might be good to very carefully look at it again.
I think any search with a hashtable and path dependent evaluation (repetitions and 50 move-rule) will be inherently unstable.
Yes, but SF often starts to oscillate between say +8 and +108 once its position is completely winning.
syzygy
Posts: 5712Joined: Tue Feb 28, 2012 11:56 pm
Post by syzygy Sat Nov 14, 2015 10:23 pm
The last YBW version:
Code: Select all
Stockfish 161015 64 POPCNT by Tord Romstad, Marco Costalba and Joona Kiiski
...
info depth 33 seldepth 91 multipv 1 score cp 395 nodes 1048771793 nps 11350712 hashfull 848 tbhits 8498221 time 92397 pv g3g4 b2b3 e3e4 h8g7 c5c6 e6h6 h3g3 h6d6 g4g5 d6c5 g3g2 b3b2 f3e2 h7h6 g5h6 g7h6 g2h3 b2b4 e4f3 h6g7 e2d3 c5b6 d3c2 b4f4 f3d3 b6b4 d3h7 g7f6 h7h6 f6f7 c2g6 f7e6 g6e4 f4f6 e4d5 e6d5 h6f6 b4b6 f6f8 b6e3 h3h4 e3e1 h4h5 e1d1 h5h6 d1c1 h6g7
info depth 34 currmove g3g4 currmovenumber 1
info depth 34 seldepth 91 multipv 1 score cp 401 lowerbound nodes 1075259053 nps 11389852 hashfull 858 tbhits 8790474 time 94405 pv g3g4
info depth 34 currmove g3g4 currmovenumber 1
info depth 34 seldepth 91 multipv 1 score cp 407 lowerbound nodes 1098977554 nps 11422933 hashfull 861 tbhits 9051499 time 96208 pv g3g4
info depth 34 currmove g3g4 currmovenumber 1
info depth 34 seldepth 91 multipv 1 score cp 417 lowerbound nodes 1113618798 nps 11432049 hashfull 864 tbhits 9158486 time 97412 pv g3g4
info depth 34 currmove g3g4 currmovenumber 1
info depth 34 seldepth 91 multipv 1 score cp 431 lowerbound nodes 1130317664 nps 11446718 hashfull 869 tbhits 9272571 time 98746 pv g3g4
info depth 34 currmove g3g4 currmovenumber 1
info depth 34 seldepth 91 multipv 1 score cp 451 lowerbound nodes 1167270249 nps 11474537 hashfull 876 tbhits 9499388 time 101727 pv g3g4
info depth 34 currmove g3g4 currmovenumber 1
info depth 34 seldepth 91 multipv 1 score cp 436 upperbound nodes 1195418225 nps 11501705 hashfull 884 tbhits 9679029 time 103934 pv g3g4 h7h5
info depth 34 currmove g3g4 currmovenumber 1
info depth 34 currmove f3g4 currmovenumber 3
info depth 34 seldepth 91 multipv 1 score cp 389 upperbound nodes 1197322040 nps 11499774 hashfull 884 tbhits 9702828 time 104117 pv g3g4 h7h5
info depth 34 currmove g3g4 currmovenumber 1
info depth 34 seldepth 91 multipv 1 score cp 318 upperbound nodes 1203365591 nps 11499943 hashfull 886 tbhits 9765383 time 104641 pv g3g4 h7h5
info depth 34 currmove g3g4 currmovenumber 1
info depth 34 currmove f3g4 currmovenumber 2
info depth 34 seldepth 91 multipv 1 score cp 213 upperbound nodes 1215879610 nps 11514447 hashfull 892 tbhits 9851132 time 105596 pv g3g4 h7h5
info depth 34 currmove g3g4 currmovenumber 1
info depth 34 currmove h3h4 currmovenumber 3
info depth 34 seldepth 91 multipv 1 score cp 56 upperbound nodes 1456308603 nps 11548106 hashfull 934 tbhits 13357687 time 126108 pv g3g4 h7h5
info depth 34 currmove g3g4 currmovenumber 1
info depth 34 seldepth 91 multipv 1 score cp 75 nodes 1526996698 nps 11554938 hashfull 938 tbhits 14611220 time 132151 pv g3g4 h7h5 c5c6 h5g4 f3g4 e6d6 g4f5 d6f6 f5c2 b2b4 c2e4 b4b2 e4g2 f6d6 e3g5 b2b3 h3g4 e5e4 g4h5 d6h2 g5h4 h2d6 g2e4 b3b5 e4f5 h8g7 h4g4 g7f8 g4f3 f8e7 f3e2 b5e5 e2c2 e5c5 c2e4 e7f8 e4f3 f8g7 f3g2 g7f8 g2f2 c5b5 h5g4 b5b4 g4h3 b4f4 f2b2 f4f3 h3g2
info depth 35 currmove g3g4 currmovenumber 1
info depth 35 seldepth 91 multipv 1 score cp 81 lowerbound nodes 1551106443 nps 11575939 hashfull 941 tbhits 14950292 time 133994 pv g3g4
info depth 35 currmove g3g4 currmovenumber 1
info depth 35 seldepth 91 multipv 1 score cp 75 upperbound nodes 1576992926 nps 11597838 hashfull 946 tbhits 15461856 time 135973 pv g3g4 h7h5
info depth 35 currmove g3g4 currmovenumber 1
info depth 35 seldepth 91 multipv 1 score cp 66 upperbound nodes 1654443618 nps 11680459 hashfull 953 tbhits 16650344 time 141642 pv g3g4 h7h5
info depth 35 currmove g3g4 currmovenumber 1
info depth 35 seldepth 91 multipv 1 score cp 52 upperbound nodes 1749868036 nps 11784178 hashfull 961 tbhits 17785968 time 148493 pv g3g4 h7h5
info depth 35 currmove g3g4 currmovenumber 1
info depth 35 seldepth 91 multipv 1 score cp 31 upperbound nodes 1858698174 nps 11899019 hashfull 969 tbhits 18982885 time 156206 pv g3g4 h7h5
info depth 35 currmove g3g4 currmovenumber 1
info depth 35 seldepth 91 multipv 1 score cp 47 lowerbound nodes 1861453086 nps 11901113 hashfull 970 tbhits 19016744 time 156410 pv g3g4
info depth 35 currmove g3g4 currmovenumber 1
info depth 35 currmove h3h4 currmovenumber 2
info depth 35 seldepth 91 multipv 1 score cp 23 upperbound nodes 1967615396 nps 12007172 hashfull 978 tbhits 20008763 time 163870 pv g3g4 h7h5
info depth 35 currmove g3g4 currmovenumber 1
info depth 35 seldepth 91 multipv 1 score cp 58 lowerbound nodes 1972431273 nps 12007105 hashfull 980 tbhits 20073775 time 164272 pv g3g4
info depth 35 currmove g3g4 currmovenumber 1
info depth 35 currmove f3g4 currmovenumber 3
info depth 35 seldepth 91 multipv 1 score cp 6 upperbound nodes 2080799941 nps 12077801 hashfull 986 tbhits 20883996 time 172283 pv g3g4 h7h5
info depth 35 currmove g3g4 currmovenumber 1
info depth 35 currmove h3h4 currmovenumber 3
info depth 35 seldepth 91 multipv 1 score cp 0 nodes 2202223495 nps 12160530 hashfull 987 tbhits 22007990 time 181096 pv g3g4 h7h5 c5c6 h5g4 f3g4 e6d6 g4f5 d6f6 f5c2 b2b4 c2e4 b4b2 e4g2 f6d6 e3g5 b2b3 h3g4 e5e4 g4h5 d6h2 g5h4 h2d6 g2e4 b3b5 e4f5 h8g7 h4g4 g7f8 g4f3 d6e5 h5g4 b5b4 g4h3 f8e7 f5g4 e5d6 f3e3 e7d8 g4f3 d8c7 e3c3 d6h6 h3g2 h6g5 g2f2 g5h4 f2g1 h4g5 g1f2
info depth 36 currmove g3g4 currmovenumber 1
info depth 36 seldepth 91 multipv 1 score cp 0 nodes 2382654908 nps 12217677 hashfull 993 tbhits 24800412 time 195017 pv g3g4 h7h5 c5c6 h5g4 f3g4 e6d6 g4f5 d6f6 f5c2 b2b4 c2e4 b4b2 e4g2 f6d6 e3g5 b2b3 h3g4 e5e4 g4h5 d6h2 g5h4 h2d6 g2e4 b3b5 e4f5 h8g7 h4g4 g7f8 g4f3 d6e5 h5g4 b5b4 g4h3 f8e7 f5g4 e5d6 f3e3 e7d8 g4f3 d8c7 e3c3 d6h6 h3g2 h6g5 g2f2 g5h4 f2g1 h4g5 g1f2
info depth 37 currmove g3g4 currmovenumber 1
info depth 37 currmove f3g4 currmovenumber 2
info depth 37 seldepth 91 multipv 1 score cp 6 lowerbound nodes 2590596209 nps 12099087 hashfull 995 tbhits 28213893 time 214115 pv f3g4
info depth 37 currmove f3g4 currmovenumber 1
info depth 37 seldepth 91 multipv 1 score cp 12 lowerbound nodes 2609754009 nps 12090982 hashfull 995 tbhits 28378030 time 215843 pv f3g4
info depth 37 currmove f3g4 currmovenumber 1
info depth 37 seldepth 91 multipv 1 score cp 21 lowerbound nodes 2621254718 nps 12089877 hashfull 995 tbhits 28456254 time 216814 pv f3g4
info depth 37 currmove f3g4 currmovenumber 1
info depth 37 seldepth 91 multipv 1 score cp 13 upperbound nodes 2657852383 nps 12089279 hashfull 996 tbhits 28761044 time 219852 pv f3g4 e6f6
info depth 37 currmove f3g4 currmovenumber 1
info depth 37 currmove g3g4 currmovenumber 3
info depth 37 seldepth 91 multipv 1 score cp 0 nodes 2697227434 nps 12083865 hashfull 996 tbhits 29013379 time 223209 pv f3g4 e6f6 c5c6 f6f1 h3h4 f1f6 e3g5 b2h2 g4h3 f6d6 b7b8r d6b8 g5e7 b8c8 g3g4 h2c2 h3g2 c2g2 e7e5 h8g8 e5d5 g8f8 d5g2 c8d8 g4g5 d8d4 g2g4 d4f2 g4g3 f2d4 h4h3 f8e7 g3a3 e7d8 a3g3 d8e7
info depth 38 currmove f3g4 currmovenumber 1
info depth 38 seldepth 91 multipv 1 score cp 0 nodes 2830947598 nps 12119872 hashfull 999 tbhits 31050429 time 233579 pv f3g4 e6f6 c5c6 f6f1 h3h4 f1f6 e3g5 b2h2 g4h3 h2h3 h4h3 f6f1 h3h4 f1h1 h4g4 h1d1 g4h4 d1h1
info depth 39 currmove f3g4 currmovenumber 1
info depth 39 currmove g3g4 currmovenumber 2
info depth 39 seldepth 91 multipv 1 score cp 0 nodes 2954260559 nps 12165561 hashfull 999 tbhits 32759659 time 242838 pv f3g4 e6f6 c5c6 f6f1 h3h4 f1f6 e3g5 b2h2 g4h3 h2h3 h4h3 f6f1 h3h4 f1h1 h4g4 h1d1 g4h4 d1h1
info depth 40 currmove f3g4 currmovenumber 1
info depth 40 currmove g3g4 currmovenumber 2
info depth 40 seldepth 91 multipv 1 score cp 6 lowerbound nodes 3071886438 nps 12165501 hashfull 999 tbhits 34316910 time 252508 pv g3g4
info depth 40 currmove g3g4 currmovenumber 1
info depth 40 seldepth 91 multipv 1 score cp 12 lowerbound nodes 3085824015 nps 12161314 hashfull 999 tbhits 34544679 time 253741 pv g3g4
info depth 40 currmove g3g4 currmovenumber 1
info depth 40 seldepth 91 multipv 1 score cp 21 lowerbound nodes 3096161022 nps 12158591 hashfull 999 tbhits 34659674 time 254648 pv g3g4
info depth 40 currmove g3g4 currmovenumber 1
info depth 40 seldepth 91 multipv 1 score cp 35 lowerbound nodes 3107486402 nps 12152812 hashfull 999 tbhits 34786548 time 255701 pv g3g4
info depth 40 currmove g3g4 currmovenumber 1
info depth 40 seldepth 91 multipv 1 score cp 56 lowerbound nodes 3116303716 nps 12151558 hashfull 999 tbhits 34918714 time 256453 pv g3g4
info depth 40 currmove g3g4 currmovenumber 1
info depth 40 seldepth 91 multipv 1 score cp 87 lowerbound nodes 3131730680 nps 12147719 hashfull 999 tbhits 35084333 time 257804 pv g3g4
info depth 40 currmove g3g4 currmovenumber 1
info depth 40 seldepth 91 multipv 1 score cp 134 lowerbound nodes 3141857192 nps 12147983 hashfull 999 tbhits 35161209 time 258632 pv g3g4
info depth 40 currmove g3g4 currmovenumber 1
info depth 40 seldepth 91 multipv 1 score cp 205 lowerbound nodes 3192764362 nps 12152032 hashfull 999 tbhits 35583036 time 262735 pv g3g4
info depth 40 currmove g3g4 currmovenumber 1
info depth 40 seldepth 91 multipv 1 score cp 152 upperbound nodes 3317344064 nps 12150464 hashfull 999 tbhits 36851604 time 273022 pv g3g4 h7h5
info depth 40 currmove g3g4 currmovenumber 1
info depth 40 seldepth 91 multipv 1 score cp 0 nodes 3730671684 nps 12193570 hashfull 999 tbhits 43741596 time 305954 pv g3g4 h7h5 c5c6 h5g4 f3g4 e6d6 g4f5 d6f6 f5c2 b2b4 c2e4 b4b2 h3g4 f6e6 g4g5 e6e7 g5f5 e7f7 f5e5 f7g7 e5e6 g7g8 e6f5 g8f7 f5g4 f7e6 g4g3 e6g8 g3f3 g8g7 e4d5 g7f6 f3e4 f6e7 e4d3 e7a3 d3d4 a3b4 d4e5 b4e7 d5e6 e7c7 e5f5 b2b5 f5g4 c7g7 g4f3 b5b7 c6b7
info depth 41 currmove g3g4 currmovenumber 1
info depth 41 seldepth 91 multipv 1 score cp 0 nodes 4282304718 nps 12219410 hashfull 999 tbhits 53087677 time 350451 pv g3g4 h7h5 c5c6 h5g4 f3g4 e6d6 g4f5 d6f6 f5c2 b2b4 c2e4 b4b2 h3g4 f6e6 g4g5 e6e7 g5f5 e7f7 f5e5 f7g7 e5e6 g7g8 e6f5 g8f7 f5g4 f7e6 g4g3 e6g8 g3f3 g8g7 e4d5 g7f6 f3e4 f6e7 e4d3 e7a3 d3d4 a3b4 d4e5 b4e7 d5e6 e7c7 e5f5 b2b5 f5g4 c7g7 g4f3 b5b7 c6b7
This is with 6 threads, 4096 hash, 6-piece TBs.
syzygy
Posts: 5712Joined: Tue Feb 28, 2012 11:56 pm
Post by syzygy Sat Nov 14, 2015 10:57 pm
And it also happens when using 5-piece TBs. This time the first lazy version from abrok:
Code: Select all
Stockfish 201015 64 POPCNT by Tord Romstad, Marco Costalba and Joona Kiiski
...
info depth 30 seldepth 85 multipv 1 score cp 347 nodes 1150331839 nps 15478092 hashfull 794 tbhits 4007548 time 74320 pv g3g4 b2b3 e3e4 h8g7 c5c6 e6h6 h3g3 h6d6 g4g5 d6c5 g3g2 b3b2 g2h3 b2b3 e4g4 c5c6 b7b8q b3f3 h3h2 f3f2 h2g1 c6c5 b8b4 f2f4 b4c5 f4g4 g1f2 g4g5 c5c7 g7g6 f2f3 h7h5 c7e7 g5f5 f3e4 f5g5 e7e6 g6g7 e6e8 g7f6 e8f8 f6g6 f8d6 g6g7 d6c6 h5h4 c6c8 g7g6 c8h8 g5h5
info depth 31 currmove g3g4 currmovenumber 1
info depth 31 seldepth 85 multipv 1 score cp 353 lowerbound nodes 1183858713 nps 15463553 hashfull 804 tbhits 4136930 time 76558 pv g3g4
info depth 31 currmove g3g4 currmovenumber 1
info depth 31 seldepth 85 multipv 1 score cp 359 lowerbound nodes 1185968390 nps 15462228 hashfull 805 tbhits 4140721 time 76701 pv g3g4
info depth 31 currmove g3g4 currmovenumber 1
info depth 31 seldepth 85 multipv 1 score cp 368 lowerbound nodes 1187150647 nps 15461717 hashfull 805 tbhits 4141977 time 76780 pv g3g4
info depth 31 currmove g3g4 currmovenumber 1
info depth 31 seldepth 85 multipv 1 score cp 382 lowerbound nodes 1189328529 nps 15462090 hashfull 805 tbhits 4146288 time 76919 pv g3g4
info depth 31 currmove g3g4 currmovenumber 1
info depth 31 seldepth 85 multipv 1 score cp 403 lowerbound nodes 1190783008 nps 15463308 hashfull 806 tbhits 4149768 time 77007 pv g3g4
info depth 31 currmove g3g4 currmovenumber 1
info depth 31 seldepth 85 multipv 1 score cp 435 lowerbound nodes 1215273511 nps 15465233 hashfull 812 tbhits 4222459 time 78581 pv g3g4
info depth 31 currmove g3g4 currmovenumber 1
info depth 31 seldepth 85 multipv 1 score cp 482 lowerbound nodes 1345596617 nps 15481575 hashfull 846 tbhits 4592063 time 86916 pv g3g4
info depth 31 currmove g3g4 currmovenumber 1
info depth 31 currmove f3g4 currmovenumber 2
info depth 31 currmove h3h4 currmovenumber 3
info depth 31 seldepth 85 multipv 1 score cp 446 upperbound nodes 1720653986 nps 15315394 hashfull 921 tbhits 5530144 time 112348 pv g3g4 h7h5
info depth 31 currmove g3g4 currmovenumber 1
info depth 31 currmove f3g4 currmovenumber 2
info depth 31 currmove h3h4 currmovenumber 3
info depth 31 seldepth 85 multipv 1 score cp 341 upperbound nodes 1767781632 nps 15305468 hashfull 924 tbhits 5701835 time 115500 pv g3g4 h7h5
info depth 31 currmove g3g4 currmovenumber 1
info depth 31 currmove f3g4 currmovenumber 2
info depth 31 currmove h3h4 currmovenumber 3
info depth 31 seldepth 85 multipv 1 score cp 184 upperbound nodes 1959540320 nps 15256464 hashfull 948 tbhits 6636808 time 128440 pv g3g4 h7h5
info depth 31 currmove g3g4 currmovenumber 1
info depth 31 currmove h3h4 currmovenumber 2
info depth 31 currmove f3g4 currmovenumber 3
info depth 31 seldepth 85 multipv 1 score cp 74 nodes 2639234234 nps 15077805 hashfull 988 tbhits 11998220 time 175041 pv g3g4 h7h5 c5c6 h5g4 f3g4 e6d6 g4f5 d6f6 f5c2 b2b4 c2e4 b4b2 c6c7 f6e6 h3g3 b2b7 e4b7 e6g6 g3f2 g6c2 f2e1 c2c7 e3h6 c7h7 h6f8 h7g8 f8f6 g8g7 f6h4 g7h7 h4d8 h7g8 d8e7 g8h7 e7e8 h8g7 e8d7 g7h6 d7d6 h7g6 d6f8 h6h5 b7f3 h5h4 f3e2 g6g1 e2f1 g1e3 e1d1 e3b3 d1d2 b3b2 d2d3
info depth 32 currmove g3g4 currmovenumber 1
info depth 32 currmove h3h4 currmovenumber 2
info depth 32 currmove f3g4 currmovenumber 3
info depth 32 seldepth 85 multipv 1 score cp 68 upperbound nodes 2984659840 nps 15027666 hashfull 994 tbhits 14498737 time 198611 pv g3g4 h7h5
info depth 32 currmove g3g4 currmovenumber 1
info depth 32 currmove h3h4 currmovenumber 2
info depth 32 currmove f3g4 currmovenumber 3
info depth 32 seldepth 85 multipv 1 score cp 62 upperbound nodes 3689434244 nps 14972745 hashfull 999 tbhits 18344533 time 246410 pv g3g4 h7h5
info depth 32 currmove g3g4 currmovenumber 1
info depth 32 currmove h3h4 currmovenumber 2
info depth 32 currmove f3g4 currmovenumber 3
info depth 32 seldepth 85 multipv 1 score cp 52 upperbound nodes 4222710781 nps 15062335 hashfull 999 tbhits 21576080 time 280349 pv g3g4 h7h5
info depth 32 currmove g3g4 currmovenumber 1
info depth 32 currmove h3h4 currmovenumber 2
info depth 32 currmove f3g4 currmovenumber 3
info depth 32 seldepth 85 multipv 1 score cp 52 nodes 4612945796 nps 15111480 hashfull 999 tbhits 23201347 time 305261 pv f3g4 e6f6 c5c6 f6f1 h3h4 f1f6 e3g5 b2h2 g4h3 f6d6 b7b8r d6b8 g5e7 b8c8 g3g4 h2c2 h3g2 c2g2 e7e5 h8g8 e5d5 g8f8 d5g2 c8d8 g4g5 d8d4 g2g4 d4f2 g4g3 f2d4 h4h3 f8e7 g3a3 e7d8 a3b3 d8e7 b3f3 e7e8 f3e2 e8d8 e2c2 d4e3 h3h4 e3e1 h4g4 e1e6 g4f4 e6f7 f4g3 f7d5 g3h4 d5h1 h4g4 d8c7 c2c4 h1d1 g4f5 d1h5 c4d5 h7h6 d5d7 c7b6 d7d4 b6c6 d4e4 c6b5 e4d5 b5b6
info depth 33 currmove f3g4 currmovenumber 1
info depth 33 seldepth 85 multipv 1 score cp 58 lowerbound nodes 4657316183 nps 15117867 hashfull 999 tbhits 23415887 time 308067 pv f3g4
info depth 33 currmove f3g4 currmovenumber 1
info depth 33 currmove h3h4 currmovenumber 2
info depth 33 currmove g3g4 currmovenumber 3
info depth 33 seldepth 85 multipv 1 score cp 52 upperbound nodes 4818872373 nps 15200147 hashfull 999 tbhits 24070640 time 317028 pv f3g4 e6f6
info depth 33 currmove f3g4 currmovenumber 1
info depth 33 seldepth 85 multipv 1 score cp 58 lowerbound nodes 4851028665 nps 15205365 hashfull 999 tbhits 24191766 time 319034 pv f3g4
info depth 33 currmove f3g4 currmovenumber 1
info depth 33 currmove h3h4 currmovenumber 2
info depth 33 currmove g3g4 currmovenumber 3
info depth 33 seldepth 85 multipv 1 score cp 59 nodes 4897270188 nps 15210000 hashfull 999 tbhits 24384466 time 321977 pv f3g4 e6f6 c5c6 f6f1 h3h4 f1f6 e3g5 b2h2 g4h3 f6d6 b7b8r d6b8 g5e7 b8c8 g3g4 h2c2 h3g2 c2g2 e7e5 h8g8 e5d5 g8f8 d5g2 c8d8 g4g5 d8d4 g2g4 d4f2 g4g3 f2d4 h4h3 f8e7 g3a3 e7d8 a3b3 d8e7 b3f3 e7e8 f3e2 e8d8 e2c2 d4e3 h3h4 e3e1 h4g4 e1e6 g4f4 e6f7 f4g3 f7d5 g3h4 d5h1 h4g4 d8c7 g4f4 h1h3 c2c5 h3h4 f4f5 h4h5 c5d5 h7h6 d5d7 c7b6 d7b7 b6c5 f5f6 h5g5 f6f7
info depth 34 currmove f3g4 currmovenumber 1
info depth 34 currmove h3h4 currmovenumber 2
info depth 34 currmove g3g4 currmovenumber 3
info depth 34 seldepth 85 multipv 1 score cp 53 upperbound nodes 5030094799 nps 15203872 hashfull 999 tbhits 24901005 time 330843 pv f3g4 e6f6
info depth 34 currmove f3g4 currmovenumber 1
info depth 34 currmove h3h4 currmovenumber 2
info depth 34 currmove g3g4 currmovenumber 3
info depth 34 seldepth 85 multipv 1 score cp 47 upperbound nodes 5560200970 nps 15314995 hashfull 999 tbhits 26702192 time 363056 pv f3g4 e6f6
info depth 34 currmove f3g4 currmovenumber 1
info depth 34 currmove h3h4 currmovenumber 2
info depth 34 currmove g3g4 currmovenumber 3
info depth 34 seldepth 85 multipv 1 score cp 46 nodes 5816535050 nps 15391812 hashfull 999 tbhits 27310128 time 377898 pv f3g4 e6f6 c5c6 f6f1 h3h4 f1f6 e3g5 b2h2 g4h3 f6d6 b7b8r d6b8 g5e7 b8c8 g3g4 h2c2 h3g2 c2g2 e7e5 h8g8 e5d5 g8f8 d5g2 c8d8 g4g5 d8d4 g2g4 d4f2 g4g3 f2d4 h4h3 f8e7 g3a3 e7d8 a3b3 d8e7 b3f3 e7e8 f3e2 e8d8 e2c2 d4e3 h3h4 e3e1 h4g4 e1e6 g4f4 e6f7 f4g3 f7d5 g3h4 d5h1 h4g4 d8c7 g4f4 h1h3 c2c5 h3h4 f4f5 h4h5 c5d5 h7h6 d5d7 c7b6 d7b7 b6c5 b7e7 c5c6 e7e6 c6c5 e6e5 c5c6 e5e4 c6b6
info depth 35 currmove f3g4 currmovenumber 1
info depth 35 currmove g3g4 currmovenumber 2
info depth 35 currmove h3h4 currmovenumber 3
info depth 35 seldepth 85 multipv 1 score cp 46 nodes 6420941265 nps 15380568 hashfull 999 tbhits 29821885 time 417471 pv g3g4 h7h5 c5c6 h5g4 f3g4 e6d6 g4f5 d6f6 f5c2 b2b4 c2e4 b4b2 c6c7 f6e6 h3g3 b2b7 e3h6 e6h6 c7c8q h8g7 c8b7 g7f8 g3f3 h6f4 f3e2 f4g4 e2d2 g4f4 d2d3 f4f1 d3c3 f1c1 e4c2 c1e3 c3b2 e3d4 b2b1 d4g1 b1a2 g1f2 b7c6 e5e4 a2a3 f2e3 c2b3 e3a7 a3b4 a7e7 b4c3 e7e5 c3c2 e5h2 c2c1 h2f4 c1b1 f4f1 b1a2 f1f2 b3c2 f2a7 c2a4 a7f2 a2b1 f2g1 b1c2 g1f2 c2b3
info depth 36 currmove g3g4 currmovenumber 1
info depth 36 currmove h3h4 currmovenumber 2
info depth 36 currmove f3g4 currmovenumber 3
info depth 36 seldepth 85 multipv 1 score cp 40 upperbound nodes 8147649972 nps 15478675 hashfull 999 tbhits 39417150 time 526379 pv g3g4 h7h5
info depth 36 currmove g3g4 currmovenumber 1
info depth 36 currmove h3h4 currmovenumber 2
info depth 36 currmove f3g4 currmovenumber 3
info depth 36 seldepth 85 multipv 1 score cp 37 nodes 8871192866 nps 15408866 hashfull 999 tbhits 43326926 time 575720 pv g3g4 h7h5 c5c6 h5g4 f3g4 e6d6 g4f5 d6f6 f5c2 b2b4 c2e4 b4b2 c6c7 f6e6 h3g3 b2b7 e3h6 e6h6 c7c8q h8g7 c8b7 g7f6 g3f3 h6f4 f3e2 f4g4 e2d2 g4f4 d2d3 f4f1 d3c3 f1c1 e4c2 c1e3 c3b2 e3d4 b2b1 e5e4 b7b8 d4g1 b1a2 g1c5 b8f4 f6g7 c2a4 c5c4 a4b3 c4a6 a2b1 a6d3 b3c2 d3b5 b1c1 b5c5 f4b8 c5g1 c1b2 g1d4 b2b1 d4g1 b1a2 g1f2 b8b2 f2f6 b2b5 e4e3 b5e2 f6d4 e2g2 g7f6 g2c6 f6e5 a2b1 d4b4 b1c1
info depth 37 currmove g3g4 currmovenumber 1
Score goes down and SF switches from 60.g4 to 60.Bg4. Here it switches back again to 60.g4 again, but still with a low score.
Now I have not verified that 60.Bg4 is really a draw, but 60.g4 is winning and should be found with a large positive score.
This does not happen every time, but once every 3-4 tries or so.